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Chlorastrolite
Chlorastrolite

Blue John
Blue John



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Chlorastrolite
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Blue John

Chlorastrolite and Blue John Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.1-3.5
Granular
None
5-6
Ca 2(Mg,Fe)Al 2(SiO 4)(Si 2O 7)(OH) 2 · H 2O)Arthur Thomas , Gemstones (2009)
 
-
-
-
3.00-3.25
-
Perfect
-9999
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Chlorastrolite and Blue John Chemical Formula

While comparing Chlorastrolite and Blue John physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Chlorastrolite and Blue John chemical formula.

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Chlorastrolite and Blue John Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chlorastrolite and Blue John Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chlorastrolite Vs Blue John during the identification of gemstone. Specific gravity of Chlorastrolite is whereas that of Blue John is .